JPH08147935A - Accidental recording preventive mechanism of recording medium housing body - Google Patents

Abstract

PURPOSE: To make it possible to detect recording okay/no of a disk cartridge by using not only a mechanical sensor but a transmission type optical sensor and reflection type optical sensor as well. CONSTITUTION: This accidental recording preventive mechanism 21 of the disk cartridge 1 is composed of recording okay/no detection holes 22 which are disposed at a shell 4 as recording medium housing body for housing the optical disk and display the state of recording okay/no to an optical disk, an accidental recording preventive member 23 which discriminates the recording okay/no for the optical disk by operating the detection hole 22 to open or close and an operating window part 24 which is disposed at the shell 4 in order to operate the preventive member 23 to slide. Upper and lower halves 2, 3 are provided with the recording okay/no detection holes 22. The accidental recording preventive member 23 are composed of operating members 31 and detecting members 32 and are so formed as to be assembled to each other. The detecting members 32 are colored in a color having a high reflectivity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erroneous recording prevention mechanism for a recording medium container for accommodating a recordable and / or reproducible recording medium such as a magneto-optical disc or an optical disc.

[0002]

2. Description of the Related Art Conventionally, an erroneous recording prevention mechanism such as a disc cartridge, which is a recording medium container for accommodating a recordable and / or reproducible recording medium such as a magneto-optical disc and an optical disc, has been used in upper and lower halves constituting a disc cartridge. An erroneous recording of an information signal recorded on a recording medium such as an optical disc by providing a recording enable / disable detection hole near the corner and sliding the erroneous recording prevention member on the inside of the half to open / close the detection hole. It also prevents accidental erasure.

Such an erroneous recording prevention mechanism of the recording medium container is applied to the disc cartridge 1 as shown in FIG. 8, for example.

In this disk cartridge 1, a flat rectangular upper and lower halves 2 and 3 formed by molding a synthetic resin, for example, are butted to each other and are joined together by screwing or the like to form a shell 4 as a recording medium container. Configure and
A disk-shaped recording medium, for example, an optical disk (hereinafter referred to simply as a disk) 5 on which additional recording is possible, is rotatably accommodated in the shell 4. A central hole 6 is formed in the upper and lower halves 2 and 3 so as to face the central position of the disc 5 and a clamp mechanism is inserted therein, and a pickup for writing and / or reading the disc 5 in the radial direction of the disc 5. A rectangular opening 7 facing the device is provided.

On the surface side of the shell 4, the central hole 6 is formed.
And a slide shutter 8 having a substantially U-shaped cross section for opening and closing the opening 7.

When the disk cartridge 1 thus constructed is mounted in the recording / reproducing apparatus, the lock mechanism of the slide shutter 8 is released, the slide shutter 8 opens the opening 7 and the center hole 6, and the shell 4 is opened. A clamp mechanism for rotationally driving the disk 5 accommodated therein clamps the disk 5 so that the disk 5 can be rotationally driven, and when the pickup device faces the opening 7, the disk 5 can be written and / or read out. It is possible.

In the above-mentioned disc cartridge 1,
The erroneous recording prevention mechanism 11 for the disk 5 to be housed is provided in the opposite direction corresponding to each surface of the disk 5 and in the vicinity of both corners on one end side of the shell 4 corresponding to each surface of the disk 5. Has been.

The erroneous recording prevention mechanism 11 allows an erroneous recording prevention member housed between the rising peripheral walls generally provided inside the half to be slidable within the peripheral wall, and opens and closes a recording permission / prohibition detecting hole provided in the half. Whether or not the disc can be recorded is determined by the operation.

9 to 13 are sectional views of the conventional erroneous recording prevention mechanism 11 described above.

The erroneous recording prevention mechanism 11 is provided in the shell 4 as a recording medium housing, and has a recording / non-recording detection hole 12 for displaying a recording / non-recording state on a disk 5 as a recording medium, and the recording / non-recording state. To operate the erroneous recording prevention member 13 and the erroneous recording prevention member 13 for preventing erroneous recording of the recording signal recorded on the disc by opening / closing the detection hole 12 to discriminate whether or not recording is possible on the disc. The operation window portion 1 provided in the shell 4
It is equipped with 4.

The recordability detection hole 12 is formed in either one of the upper and lower halves 2 and 3 (the lower half 3 in FIGS. 9 to 13) of the shell 4, and the operation window portion 14 is formed.
Is formed in the other half (the upper half 2 in FIGS. 9 to 13).

The erroneous recording prevention member 13 has a detection portion 13a facing the recording enable / disable detection hole 12 and an operation portion 13b facing the operation window portion 14.

The detecting portion 13a and the operating portion 13b are integrally formed of plastic and are colored in a color such as red or blue having a high saturation and a low lightness different from the color of the shell 4.

Then, as shown in FIG. 9, when the operation window portion 14 of the erroneous recording preventing member 13 is unblocked (open state) by the operation portion 13b, the operation portion 13 is opened.
The blockage of the recordability detection hole 12 by the detection unit 13a formed integrally with b is also released (open state).

Further, as shown in FIG.
When b is slid to the right in FIG. 9 and the operation window portion 14 is closed by the operation portion 13b, the operation portion 13b is exposed to the operation window portion 14 and the color of the operation portion 13b is the above-mentioned operation window. In addition to being displayed on the section 14, the recording possibility detection hole 12 is closed by the detection section 13a.

Then, when the disc cartridge 1 is mounted in the recording / reproducing apparatus with the recording / non-detecting hole 12 closed by the detecting section 13a, as shown in FIG. 11, a mechanical sensor 15 provided in the recording / reproducing apparatus. The pin 16 is brought into contact with the detecting portion 13a and pushed down to detect that the recording enable / disable detecting hole 12 is closed, thereby detecting whether recording is possible or not.

[0017]

The conventional erroneous recording prevention mechanism 11 has the following problems.

(1) The recording propriety detection hole 12 is formed in only one of the upper and lower halves 2 and 3, and the recording propriety detection hole is provided on the upper and lower surfaces of the shell 4 as a recording medium container. Since it is not provided so as to penetrate the (upper and lower halves 2, 3), as shown in FIG.
The light emitting portion 17a and the light receiving portion 17 above and below the
It is not possible to detect whether the recording permission / inhibition detection hole 12 is open or closed by using the transmission type optical sensor 17 in which b is arranged.

(2) Detection unit 13a of erroneous recording prevention member 13
And the operation portion 13b are integrally formed of plastic, and the detection portion 13a and the operation portion 13b are colored in the same color with high saturation and low lightness, so that the light reflectance in the detection portion 13a is low, It was difficult to use the reflection type optical sensor 18 as shown in FIG. (It is possible to change the coloring of the detection unit 13a and the operation unit 13b by so-called two-color molding, but the cost is high).

An object of the present invention is to solve the above-mentioned conventional problems and to provide an erroneous recording preventing mechanism which can be used not only for a mechanical sensor but also for a transmission type optical sensor and a reflection type optical sensor. It was made.

[0021]

According to a first aspect of the present invention, there is provided a recording-medium accommodating body for accommodating a recordable and reproducible medium and a recording propriety detection hole for displaying a recording propriety state on the recording medium. And an erroneous recording prevention member for preventing erroneous recording of a recording signal recorded on the recording medium by opening and closing the recording possibility detection hole to discriminate whether recording is possible on the recording medium. In the erroneous recording prevention mechanism of the recording medium container provided with the operation window portion provided in the recording medium container, the recording enable / disable detection hole is provided on the upper and lower surfaces of the recording medium container. It was provided through.

According to a second aspect of the present invention, in the erroneous recording prevention mechanism according to the first aspect, the erroneous recording prevention member includes an operation member facing the operation window portion of the recording medium container and a detection member facing the recording possibility detection hole. The detection member is formed separately from the operation member, is detachable from the operation member, and the detection member is colored with a color having a higher light reflectance than the operation member.

According to a third aspect of the present invention, in the erroneous recording prevention mechanism according to the second aspect, the detection member is 30 with respect to light rays in the infrared region.
It was colored in a color having a light reflectance of not less than%.

[0024]

In the erroneous recording prevention mechanism of the first aspect, the light emitting portion and the light receiving portion of the transmissive optical sensor are arranged to face each other above and below the recordability detection hole so as to sandwich the recording medium container. When the recording member detection hole is closed by the detection member, the detection light from the light emitting portion reaches the light receiving portion through the recording permission detection hole, penetrating the upper and lower surfaces of the recording medium container.

In the erroneous recording prevention mechanism of the second aspect, the erroneous recording prevention member is constructed by attaching the detection member to the operation member, and the detection member has a higher light reflectance than the operation member.

In the erroneous recording prevention mechanism of the third aspect, 30% or more of the infrared ray of the detection light emitted from the light emitting portion of the reflection type optical sensor and incident on the detection member is reflected and received. Is incident on the section.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to FIGS.

In this embodiment, the erroneous recording prevention mechanism of the recording medium housing according to the present invention is a disk cartridge which is a recording medium housing for housing a recordable and / or reproducible recording medium such as an optical disk or a magneto-optical disk. The case of application to is explained.

The disk cartridge to which the present invention is applied is a disk cartridge of the same type as that described in the above-mentioned conventional example, and the detailed description thereof will be omitted by giving the same numbers to the same members. To do.

The erroneous recording prevention mechanism according to the present invention is provided in the disk cartridge as described above in the vicinity of both corners on one end side of the disk cartridge, corresponding to each surface of the disk to be stored.

FIG. 1 is an exploded perspective view of an erroneous recording prevention mechanism 21 for a recording medium container according to the present invention.

The erroneous recording prevention mechanism 21 is provided in the shell 4 as a recording medium container for accommodating an optical disc (not shown) as a recordable and reproducible recording medium. Preventing erroneous recording of a recording signal recorded on the optical disc 7 by opening / closing the recording propriety detection hole 22 for displaying and discriminating whether recording is possible on the optical disc by opening / closing the recording propriety detection hole 22. It comprises a member 23 and an operation window portion 24 provided on the shell 4 for slidingly operating the erroneous recording prevention member 23.

The recording enable / disable detection hole 22 is provided in the shell 4
Which are provided in the upper and lower halves 2 and 3 respectively, and the upper and lower halves 2 and 3 are superposed on each other, and the screw threaded portions 25 and 26 provided in the upper and lower shells 2 and 3 are screwed. When coupled, they face each other and vertically penetrate the upper and lower surfaces of the shell 4.

The operation window portion 24 is provided on the upper half 2.

Next, the erroneous recording prevention member 23 will be described.

As shown in FIG. 2, erroneous recording prevention member 23
Includes an operation member 31 facing the operation window portion 24 and a detection member 32 facing the recording enable / disable detection holes 22 and 23.

The operating member 31 includes a front plate 41, and first and second front plates 41 provided in parallel with each other at both ends of the front plate 41.
The left and right side plates 42 and 43 and the detection member support portion 44 that is provided across the tip portions of the first and second side plates 42 and 43 allow upward and downward directions. It is formed in a housing shape that opens.

The front plate 41 has an operation piece 45 extending on the opposite side to the first and second side plates 42 and 43 at the upper end portion.

The operation piece 45 faces the outside of the upper half 2 from the operation window portion 24, and has a tip with a tip of a nail for slide operation extending in a direction protruding from the operation window portion 24. A section 46 is provided.

Further, the first and second side plates 42, 43
Is provided with a U-shaped cutout portion 47 in the center thereof, and the inside of the cutout portion 47 is a tongue-shaped elastic piece 48, and the free end of the tongue-shaped elastic piece 48 is provided. On the outer side surface on the side, a protrusion 49 for a stopper is provided that protrudes more outward than the outer surface of the first and second side plates 42, 43.

The operating member 31 is integrally formed of plastic colored in red, blue or the like having high saturation and low lightness.

Next, the detecting member 32 will be described.

The detecting member 32 includes an end face plate 51, an upper face plate 52 provided on the upper end of the end face plate 51, and the end face plate 51.
And a lower surface plate 53 provided at the lower end of the same, the side view is formed into a substantially U shape.

The detecting member 32 includes upper and lower plates 52, 5
3, the detection member support portion 44 of the operation member 31 is inserted, and the detection member support portion 44 is inserted into the upper and lower plates 52, 53.
It is detachably attached to the detection member support portion 44 in a state of being sandwiched by.

Upper and lower plates 52, 53 of the detection member 32
Protrusions 54, 54 are provided at the opposing portions of the inner surface of the.

When the detecting member supporting portion 44 is completely inserted between the upper and lower plates 52 and 53, the retaining projections 54, 54 are provided on the upper and lower ends of the inner side surface 44a of the detecting member supporting portion 44, respectively. Engagement prevents the detection member 32 from falling out of the detection member support portion 44.

The detecting member 32 is integrally formed of white or yellow colored plastic having a higher lightness and a higher light reflectance than the operating member 31.

Then, as described above, the operation member 31 colored with a color having a high saturation and a low lightness is attached to the detection member 32 colored with a color having a high lightness and a high light reflectance, thereby recording. A recording prevention member 23 is constituted, and the recording prevention member 23 is slidably attached to a recording prevention member attachment portion provided between the upper and lower halves 2 and 3.

As shown in FIG. 1, the recording prevention member mounting portion 61 sandwiches the first and second side plates 42 and 43 of the operation member 31 on the inner surfaces of the upper and lower halves 2 and 3. It is formed by erecting a pair of slide guide walls 62, 63.

The pair of slide guide walls 62, 63
Is a projection 4 for a stopper of the elastic piece 48 provided on the first and second side plates 42, 43 of the operation member 31 on the opposite surface.
It has a first positioning groove portion 64 into which 9 is fitted and a second positioning groove portion 65.

Then, when the stopper projection 49 is fitted in the second positioning groove 65, as shown in FIG.
Reference numerals 2 and 53 close the recording enable / disable detection holes 22 and 22 provided in the upper and lower halves 2 and 3, respectively, while the operating piece 45 of the operating member 31 closes the operating window portion 24 provided to the upper half 2. .

Therefore, the mechanical sensor 15 can be used to detect that the recordability detection holes 22 and 22 are closed by the detection member 32.

The fact that the recording permission / prohibition detecting holes 22 and 22 are closed by the detecting member 32 means that the operation window portion 2 is provided.
The operation piece 45 located at No. 4 is clearly displayed by a highly saturated color.

From the state shown in FIG. 4, the operation piece 45 is slid to the left side in FIG. 4 by hooking the toe on the toe hook portion 46 provided at the end portion of the operation piece 45 to slide the operation piece 45 to the stopper. When the projection 49 is fitted into the first positioning groove 64, as shown in FIG. 5, the operation piece 45 is released from the blockage of the operation window 24, and the detection member 32 is opened. The recording enable / disable detection holes 22 and 22 of the upper and lower halves 2 and 3 are also released and opened, and the recording enable / disable detection holes 22 and 22 are connected through the hollow portion of the operation member 31.

Therefore, as shown in FIG.
It is possible to detect the opening / closing of the recording permission / prohibition detection holes 22, 22 by using the transmission type optical sensor 17 including a and the light receiving portion 17b.

FIG. 7 shows a case in which the reflection type optical sensor 18 is used to detect the opening / closing of the recording enable / disable detecting holes 22, 22.

As described above, the detection member 32 is colored with a color having a higher light reflectance than the operation member 31.

Therefore, the detection light emitted from the light emitting portion 18a of the reflection type optical sensor 18 is reflected by the lower surface plate 53 of the detection member 32 and received by the light receiving portion 18b, and the recording possibility detection hole 22 is detected. The fact that it is blocked by the member 32 is reliably detected.

It is desirable that the detecting member 32 be colored with a color having a light reflectance of 30% or more with respect to a light ray in the infrared region.

Even if the detection member 32 is entirely colored,
Alternatively, only the outer surfaces of the upper and lower plates 52 and 53 may be colored.

The coloring applied to the detecting member 32 is to enhance the light reflectance, and it is not limited to white, yellow, etc., and so-called metallic color may be used. , 53 aluminum vapor deposition or the like may be applied.

In the embodiment, the case where the erroneous recording prevention mechanism of the present invention is applied to the disk cartridge has been described, but the invention can be applied to the tape cartridge and others.

[0063]

The erroneous recording prevention mechanism of the recording medium container of the present invention has the following effects.

(1) In the erroneous recording prevention mechanism according to the first aspect of the present invention, since the recording enable / disable detecting hole is formed through the upper and lower surfaces of the recording medium container, the recording enable / disable detecting hole is formed by using the transmission type optical sensor. Can be detected as open or closed.

(2) In the erroneous recording preventing mechanism according to the second aspect, the erroneous recording preventing mechanism having a higher light reflectance of the detecting member than the operating member is constituted by attaching the detecting member to the operating member. It is possible to obtain an erroneous recording prevention member having a detection member having a light reflectance higher than that of the operating member, without performing the two-color molding.

(3) In the erroneous recording prevention mechanism according to the third aspect, the detection member is colored with a color having a light reflectance of 30% or more with respect to the light rays in the infrared region. Whether or not it is blocked can be reliably detected by the reflective optical sensor.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part.

FIG. 2 is an exploded perspective view of an erroneous recording prevention member.

FIG. 3 is a perspective view showing a state where an erroneous recording prevention member is assembled.

FIG. 4 is a cross-sectional view showing a state in which a recording enable / disable detecting hole is closed.

FIG. 5 is a sectional view showing a state in which a recording enable / disable detection hole is opened.

FIG. 6 is a cross-sectional view of a state in which a transmissive optical sensor is used.

FIG. 7 is a sectional view showing a state in which a reflective optical sensor is used.

FIG. 8 is a perspective view of a disc cartridge.

FIG. 9 is a sectional view of a conventional example.

FIG. 10 is a sectional view of a conventional example.

FIG. 11 is a sectional view of a conventional example.

FIG. 12 is a cross-sectional view showing a problem of the conventional example.

FIG. 13 is a sectional view showing a problem of the conventional example.

[Explanation of symbols]

 4 ... Shell (recording medium container) 21 ... Wrong recording prevention mechanism 22 ... Recording enable / disable detection hole 23 ... Wrong recording prevention member 24 ... Operation window 31 ... Operation member 32 ... Detection member

Claims (3)

[Claims] 1. A recording propriety detection hole, which is provided in a recording medium accommodating body for accommodating a recordable and reproducible recording medium, for displaying a recording propriety state on the recording medium, and the recording propriety detection hole is opened and closed. An erroneous recording preventing member for preventing erroneous recording of a recording signal recorded on the recording medium by operating the erroneous recording preventing member by discriminating whether or not recording is possible on the recording medium, and the recording medium for operating the erroneous recording preventing member. An operation window portion provided in the storage body, wherein the recording enable / disable detection hole is provided so as to penetrate the upper and lower surfaces of the recording medium storage body. Wrong recording prevention mechanism. 2. The erroneous recording prevention member according to claim 1, further comprising an operation member facing an operation window portion of the recording medium container, and a detection member facing a recording enable / disable detection hole, wherein the detection member is the operation member. It is formed separately from the operating member, and the detecting member is colored with a color having a higher light reflectance than the operating member. Recording prevention mechanism. 3. The erroneous recording prevention mechanism for a recording medium container according to claim 2, wherein the detection member is colored with a color having a light reflectance of 30% or more with respect to a light ray in the infrared region. .